19S THE EMBRYOLOGY OF THE HONEY BEE 



MC 



Fig. yy. Transverse section through the future 'basal region of the 

 abdomen of an embryo, Stage VIII-IX; showing the structure of the 

 mesoderm (Meso), x 387. 



Fig. ~8. Transverse section through the fourth trunk segment of an 

 embryo, Stage IX, intersecting one of the tracheal vaginations (Trlnv), 

 showing the formation of blood cells (BIC), x 387. 



